Ornamental pen



FIG. 1 is a front perspective view of an ornamental pen;

FIG. 2 is a front elevational view of the ornamental pen of FIG. 1;

FIG. 3 is a rear elevational view of the ornamental pen FIG. 1;

FIG. 4 is a side elevational view of the ornamental pen of FIG. 1;

FIG. 5 is a side elevational view of the ornamental pen of FIG. 1, showing the side opposite that depicted in FIG. 4;

FIG. 6 is a bottom view of the ornamental pen of FIG. 1; and,

FIG. 7 is a plan view of the ornamental pen of FIG. 1. 

The ornamental design for an ornamental pen, as shown and described. 